Twisting-machine.



w. KUDERLI.

TWIST-ING MACHINE.

APPLICATION FILED 00T- H, I9I6 Patentd Mar. 19, 1918.

2 SHEETSSHEET I.

w. KUDERLI.

TWISTING MACHINE.

APPL ICATION FILED OCT. 11, 19l6.

Patented Mar. 19, 1918.

2, SHEETS-SHEET 2.

: AN F QEQ ERLI, OF STAAD, NEAR ROBSCHACH, SWITZERLAND.

TWISTING-MAOHINE.

Specification of Letters Patent.

Patented Mar. re, 1918.

Application filed October 17, 1916. Serial No. 126,125.

- following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

In twisting and doubling machines in which one or more threads are led to a single point above the thread or yarn carrying spool in order to be doubled or twisted and then wound upon a spool in the same machine, there is formed between the yarn carrying spools and the point above them, by reason of centrifugal force, the so called balloon. Attempts have been made to entirely suppress the ballooning by surrounding the winding-off spindle and its bobbin or cap by a tube.

Such a procedure is only possible when the normal speed of such machines is not exceeded. (There are no machines of this kind in operation that can effectively operate at 11,000 R, P. M.).

If it is desired to increase the R. P. M., say for example to 15,000 R. P. M. and eflectively operate at such speed, very great difficulties are encountered. The friction of the thread on the anti-balloonin tube becomes so great, even when the interior of the tube is highly polished, that the thread constantly breaks, and what unbroken thread there is, is rough and unsalable.

I have discovered that the great desideratum of speed may be attained without in any manner decreasing the quality of the product by decreasing, but not entirely eliminating the ballooning, for a portion of the length and diameter, and regulating the degree of ballooning according to the yarn.

Consequently the anti-ballooning tube may be adjusted to the kind of yarn and the dimension of the bobbin, to regulate the friction, so that a proper proportion may be 7 attained for a maximum R. P. M. Actual experience has shown that in this manner the R. P, M. may be increased from 5,000 to 6,000 without injury to theproduct or to the operation of the machine.

This invention has for its object the production of a novel thread-twisting machine, which is adapted to work at a much higher speed than the hitherto known twisting-machines, without the fineness of the thread being influenced in any detrimental manner. It'has been found, that the working speed of the novel machine may be even two to three times greater than that of the hitherto known machines. To this end I provide a tubular body surrounding the twisting spindle and effecting such a deflection of the thread-curve, due to the action of the centrifugal force upon the thread leaving the delivery-bobbin, that the projection of a mass-- point of this revolving thread-curve on a plane at right angles to the axis of the spindle is approached as far as possible to a circle having a much smaller diameter than the circle obtained by the projection of a mass-point of a balloon that is free to fully develop. I may then arrange-said tubular body in such a manner, that it may be adjusted parallel to the axis of the deliverybobbin for the purpose of regulating in this way the tension of the thread.

This invention will now be more particularly described with reference to the accompanying drawings, which illustrate a constructional example of the invention. In these drawings:

Figure 1 is a front view of a part of the novel machine;

Fig. 2 is a section on the line XX of Fig. 1;

Fig. 3 shows on an enlarged scale the course of the thread leaving the deliverybobbin and Fig. 4 shows a modification of a detail.

In the constructional embodiment of my invention shown 1 denotes the frame of the machine and 2 the driving shaft carrying a loose and fast pulley 2 and 2 respectively. As it has to be assumed, that a mechanism similar to that shown in the drawings is provided on both sides of the machine I provide two driving shafts 2. 3 denotes drums, over which are led cords 6 driving the twist ing spindles 5 mounted on a'bracket 4. Each is led from the spindle 5 car1'ies a delivery-bobbin 7, the u per edge of which is surrounded by a. be y 8 carried by the spindle '5.

15 denotes a cross beam arranged in the upper part of the machine and acting as a support for a plurality of bearings 15. In each of the latter is mounted a shaft 14 carrying a drum 13. The shafts 14, and therefore also the drums 13, receive their drive from a bevel gearing 11, 12 and a spurwheel gearing 9, which has operative connection to one of the driving shafts 2. In each bearing 15 is also mounted a shaft 16 to which are rigidly connected arms 17. The latter carry a bobbin-spindle 18. 19denotes a thread-guide connected to a rod 20. 21 is a trough containing a suitable solution and 22, 23 are thread- 'de rods. The thread de ivery-bobbin 7 through the solution contained in the trough 21 to the bobbin 18, which is in frictional contact with the drum. 13, so that the latter causes said bobbin 18 to rotate. The thread-guide 19 effects thereby a crosswise winding up of the thread on the bobbin-spindle 18. To this end I impart a to and fro movement to the thread-guide 19, which is operatively connected to a lever 28. All levers 28 are fixed to a shaft 29. To the latter is also fixed a lever 30 operatively connected to a slide 32 movable in a guide 31. The slide 32 carries two rolls 33 arranged on both sides of-a cam 34, which is rigidly connected to a shaft 35.

The latter has operative conection to a shaft 38 carrying a spur-wheel meshing with the gearing 9 by means of a bevel-gearing 36 and a worm-gearin 37.

Each delivery-bo bin 7 together with the bod 8 is surrounded by a tubular body 24. In he embodiment shown each body 24 has for instance a circular cross-section. The diameter of the body 24 is also somewhat greater than that of the body 8. The upper end 25 of the body 24 is flaring in a trumpet-like manner and said body 24 may also be held in a bracket 26, by set screws 24 so that it may be shifted or adjusted in a vertical direction. The provision of a tubular body 24. results in the following advantage: I

As shown in Fig. 3, the thread will be subjected, so far as it has to be taken into consideration in the present instance, to three different tension-conditions. In the part I extending from point A to point B the thread is subjected to the tension due to the centrifugal force of the piece AB and the. air resistance. In the part II, where the thread rests from the point B to the point C snugly on the inner side of the tue bular body'24, the tension is determined by the friction due to the pressing of the threadon the cylinder wall and an insignificant air resistance, which is reduced by part forming the so called balloon, the tension is determined by the centrifugal force in the piece CD and the air resistance.

In any case the tension in this piece is in the present instance considerably smaller than in the case, where no tube 24 is employed and where the balloon assumes the shape of the line 27 shown in point and dash lines.

It has now been found, that the curve BC does not coincide with a straight line when a cylindrical tube is used, that is, when the thread ofh1s stretch touches the tube, and

that each thread-element or each thread point 'does not describe on its way through the cylinder 24 a proper helical line, the pitch of which depends on the thickness of the thread and the speed of the thread, but that the middle part of the thread piece A-D, which is just in contact with the.

cylinder, that is BC, remains far behind the meridian line made by a plane passing through the spindle and the point, where the thread is wound-01f the delivery bobbin 7.

The result of this is the considerable advantage, that the fibers are not rubbed directly in a lateral direction, but are laid 'on the thread. Thus,

the thread is subjected so to speak to a kind of twisting due to a rolling of the thread in the tube 24 and brought about in a similar manner as the rolling of the thread in a rota-rubber. Besides this advantage I attain also the further advantage, that the projection of a mass-point, for instance of the mass-point m, which represents the point of the curve CD lying farthest away from the middle line M, on a plane at right angles to the axis of the spindle forms a circle having a considerably smaller diameter 0" than the projection of thelmass-point y of the bal-' loon curve 27, which is also situated farthest away from the middle line M and the projection of which forms a circle having a considerably greater diameter B.

By means of a so called antiballoon-d'evice, that is a device for pressing-in or flattening the balloon 27 over a short stretch, the diameter R is reduced at only one point, while it is never possible to obtain a similar effect as in a rota-apparatus. Experiments have shown, that threads which have been twisted on my novel twisting-machine working at a two to three times greater speed than the hitherto known machines do not show anydifierence in their fineness with regard to the threads twisted on the hitherto known best twisting-machines. Even in the case, that it should be possible to carry out a twisting process on the existing machines at the same speed, without breaking, the air friction would always have the effect to make the yarns so rough, that they could not be used.

Instead of bodies 24 "consisting of a naeaaia tube open at both ends I may as well provide tubular bodies each consisting of a plurality of rods 40 spaced apart from each other and arranged spindle 5 (Fig. 4).

What I claim is:

1. In a twisting machine, the combination with twisting spindles, delivery bobbins thereon, means to rotate the spindles and their bobbins, means to receive the twisted thread and thread guides spaced above the twisting spindles; of stationary tubes surrounding the bobbins whose upper edges are ata greater distance 'from the thread guides than their body portions, and means to adjust the tubes longitudinally of the bobbins parallel to the twisting.

and thereby alter the distance between-their edges and the guides to control the ballooning.

2. In a spinning and twistin machine, the combination with a delivery obbin and its s indie; of a stationary, vertically adjusta' le anti-ballooning tube having an upper outwardly flaring end and surrounding said bobbin and spindle.

In testimony that I claim the foregoing as my invention, I have signed my name in presence of two subscribing witnesses.

. WALTER; KUDERLI.

Witnesses: OTTO 'SGHOOP-BAUMAEY, Rtmonr HmsmMAN-Von moos; 

